I have utility jar which is using the WrappedConnection to typecast oracle connection. I am getting java.lang.NoClassDefFoundError: org/jboss/resource/adapter/jdbc/WrappedConnection .i have placed tjboss-common-jdbc-wrapper.jar in C:\jboss-4.0.2\server\custom\lib.where custom is the server. the jar file is in the class path and refered by webapp.where else i need to put the jar file. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4086950#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...